Asset Finance vs Rent-to-Own vs PPA: Solar Finance Structures Compared

The same solar system can be funded in very different ways, and the structure changes who owns the asset, who claims the tax benefit, and what the client pays each month. Choosing well is often worth more than shaving a few cents off the equipment price.

This guide compares the three main solar finance structures in South Africa: Asset Finance, Rent-to-Own and a Power Purchase Agreement (PPA). It also covers where water and as-a-service models fit.

What are the main solar finance structures in South Africa?

A solar finance structure is the legal and payment framework that decides how a system is paid for and who owns it. There are three primary options:

• Asset Finance: the client borrows to buy the system and owns it. Terms run 3 to 7 years.
• Rent-to-Own: the client rents the system with ownership transferring at the end. Terms run 5 to 15 years.
• PPA: the client pays for the electricity the system produces, not the system itself. Terms run 10 to 20 years.

There are also Solar-as-a-Service and evergreen rental models, which sit close to the PPA end of the scale where the client pays for use rather than ownership.

How does Asset Finance work?

Asset Finance is a loan secured against the solar equipment, where the client owns the asset from day one and repays over 3 to 7 years.

Because the client owns the asset, Asset Finance is the structure that unlocks the Section 12B(h) tax deduction on qualifying renewable assets. That accelerated, often 100%, deduction can materially change the after-tax cost. The detail is in Section 12B: the solar tax deduction.

Asset Finance suits clients who want the asset on their balance sheet, plan to keep the system long term, and have taxable income to deduct against.

How does Rent-to-Own work?

Rent-to-Own lets the client use the system and pay it off over 5 to 15 years, taking ownership at the end of the term.

It spreads cost over a longer period than Asset Finance, which usually means a lower monthly payment. During the rental period the client is paying for use, so the tax treatment differs from outright ownership. It suits clients who want predictable monthly costs and eventual ownership without the shorter Asset Finance term.

How does a PPA work?

A Power Purchase Agreement is an arrangement where the client buys the electricity the system generates at an agreed rate, while a third party owns and maintains the system. Terms run 10 to 20 years.

With a PPA there is no upfront capex for the client and no asset on their books. They simply pay for power, often at a rate pegged below or in line with the grid, with maintenance handled by the owner. The trade-off is that the client does not own the system and does not claim the asset-ownership tax benefits.

PPAs suit larger sites and clients who want energy savings without capital outlay or asset management. The choice between a PPA and Rent-to-Own comes up often, so we compare them directly in PPA vs Rent-to-Own.

Which structure is right for my client?

The right structure depends on three questions: does the client want to own the asset, do they have taxable income to use, and how do they want to handle capex.

A quick way to narrow it down:

• Wants ownership and has tax to deduct: Asset Finance, with Section 12B in play.
• Wants lower monthly cost and eventual ownership: Rent-to-Own.
• Wants no capex and no asset to manage: PPA or Solar-as-a-Service.

ArkFlow lets you put an indicative structure in front of the client early, so the conversation is about fit, not guesswork. See the indicative proposal explained for how that works.

What about water and batteries?

The same thinking extends beyond solar PV. ArkFlow finances solar PV, batteries, power quality equipment, generators and water.

Water has its own structures: Rent-to-Own and Water Purchase Agreements of up to 10 years, mirroring the PPA logic but for water supply. More detail is in water finance in South Africa. Batteries can be added to any energy structure, covered in financing batteries for energy security.

Want to test a structure against a real deal? Sign up free and build an indicative proposal in minutes.

Frequently asked questions

What is the difference between Asset Finance and a PPA?

With Asset Finance the client borrows to buy and owns the system, repaying over 3 to 7 years, and can claim Section 12B. With a PPA the client buys only the electricity the system produces over 10 to 20 years, owns nothing, and pays no upfront capex.

Which solar finance structure has the best tax benefit?

Asset Finance is the structure that unlocks the Section 12B(h) deduction, because the client owns the qualifying asset. Rent-to-Own and PPA are treated differently because the client is paying for use or for power rather than owning the asset outright.

Can I offer more than one structure to a client?

Yes. ArkFlow lets you present an indicative proposal so the client can see how a structure fits before committing. Figures are indicative only and not a credit offer, and the lender does the formal underwriting.

How long are the typical terms?

Asset Finance runs 3 to 7 years, Rent-to-Own 5 to 15 years, and a PPA 10 to 20 years. Water Rent-to-Own and Water Purchase Agreements run up to 10 years.